Effects of low temperature on photoinhibition and singlet oxygen production in four natural accessions of Arabidopsis.

Planta
Heta MattilaEsa Tyystjärvi

Abstract

Low temperature decreases PSII damage in vivo, confirming earlier in vitro results. Susceptibility to photoinhibition differs among Arabidopsis accessions and moderately decreases after 2-week cold-treatment. Flavonols may alleviate photoinhibition. The rate of light-induced inactivation of photosystem II (PSII) at 22 and 4 °C was measured from natural accessions of Arabidopsis thaliana (Rschew, Tenela, Columbia-0, Coimbra) grown under optimal conditions (21 °C), and at 4 °C from plants shifted to 4 °C for 2 weeks. Measurements were done in the absence and presence of lincomycin (to block repair). PSII activity was assayed with the chlorophyll a fluorescence parameter Fv/Fm and with light-saturated rate of oxygen evolution using a quinone acceptor. When grown at 21 °C, Rschew was the most tolerant to photoinhibition and Coimbra the least. Damage to PSII, judged from fitting the decrease in oxygen evolution or Fv/Fm to a first-order equation, proceeded more slowly or equally at 4 than at 22 °C. The 2-week cold-treatment decreased photoinhibition at 4 °C consistently in Columbia-0 and Coimbra, whereas in Rschew and Tenela the results depended on the method used to assay photoinhibition. The rate of singlet oxygen production by is...Continue Reading

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Oct 12, 2017·Plant Physiology·Ludwik W BielczynskiRoberta Croce

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Citations

Nov 22, 2020·International Journal of Molecular Sciences·Mirza HasanuzzamanMasayuki Fujita
Jan 15, 2021·Journal of Theoretical Biology·João Serôdio, Douglas A Campbell

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Methods Mentioned

BETA
Fluorescence

Software Mentioned

SigmaPlot
Tenela
Rschew

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